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sveticcg [70]
4 years ago
13

K/4+2-k=10 Solve for the letter k. K=?

Mathematics
1 answer:
Dvinal [7]4 years ago
5 0
K=10

inverse operations
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at Mountain Park Middle School there are 250 7th grade students currently 32% of those students are in advanced math​
makkiz [27]

Answer:

95

students in the seventh grade have taken swimming lessons.

Explanation:

We calculate  

38

%

of  

250

using the following formula:

x

=

250

×

38

100

x

=

25

0

×

38

10

0

       

(cancel by 10)

x

=

5

25

×

38

2

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(cancel by 5)

x

=

5

×

19

38

1

2

           

(cancel by 2)

x

=

5

×

19

x

=

95

Step-by-step explanation:

7 0
3 years ago
A girl wants to count the steps of a moving escalator which is going up. If she is going up on it, she counts 60 steps. If she i
Kaylis [27]
Let's V the speed of the girl in step
v the speed of the escalator in step
L the length between ground and floor.

V*60+v*60=L ==> V+v=L/60
V*90-v*90=L ==> V-v=L/90
2V=L(3+2)/180
==>V=5L/360
Time to climb (in step) with v=0 (escalator standing still)
V*t=L==> t=L/V=L/(L*5/360)=72

The girl will count 72 steps.


8 0
4 years ago
Read 2 more answers
Solve equation<br><br> -2 • 4/5 = -3 1/2 • n
kogti [31]
16/155 = n


explanation

A linear equation is an equation of a straight line. To solve linear equations, it is important to keep the following key concepts in mind:

Maintain balance of the equation by applying the same operations to both sides of an equation

Isolate for the variable by collecting like terms

Use inverse operations to rearrange an equation


to show your work

-8/ 5 = -31/2 • n
- 8/5 = -31n/2
2(-8/5) = 2 • -31/n
-16/5 = -31n
-16/5 / -31 = -31n/31
16/155 = n
8 0
3 years ago
PLEASE HELP!!!! Will be rewarded brainliest!!
kozerog [31]

Answer:

9.5

Step-by-step explanation:

If c to a is 19 then you divide the distance by 2 and you get 9.5 for the two distances.

3 0
3 years ago
What is the equation in point slope form of a line that passes through the points (-8,2) and had a slope of 1/2
AysviL [449]
First you have to plug in your information into the formula- y=mx+b
So we know the y is 2, the slope (m) is 1/2, the x is 2 and we don't know the b. Do plug it in the formula and solve... you should get 2=1/2(2)+b you will end up with 1=b and the final answer is y=1/2x+1
3 0
3 years ago
Read 2 more answers
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